Counter for shoe press machines



P 1941- J. F. SMITH I COUNTER FOR SHOE PRESS MACHINES Filed July 12,1939 4 Sheets-Sheet l flml Jami 7512255 2 Q9 WW I Aim/meg Sept. 16,1941. J SMlTH 2,256,222

COUNTER FOR SHOE PRESS MACHINES Filed July 12, 1939 4 Sheets-Sheet E wad5mm W yaaga/nwq AZZWW Sept. 16, 1941.

J. F. SMITH V,

COUNTER FOR SHOE PRESS MACHINES Filed July 12, 1959 4 Sheet-Sheet 5JMIZFSWZZZZZ J. F. SMITH 2,256,222

COUNTER FOR SHOE PRESS MACHINES Filed July 12, 1959 Sept. 16, 1941.

4 Sheets-Sheet 4 Patented Sept. 16, 1941' COUNTER FOR SHOE PRESSMACHINES John Frederick Smith, Quincy, Mass., assignor to Compo ShoeMachinery Corporation, Boston, Mass., a corporation of DelawareApplication July 12, i939, Serial No. 284,080

Claims.

This invention relates to shoe press machines of the kind adapted toapply pressure to shoe bottoms or parts in operations such as cementsole aflixing, sole conforming or leveling, channel laying, insoleoroutsole molding, or the like, and more particularly relates to acounting mechanism adapted to indicate accurately the number of shoes orwork pieces handled on a given machine.

Since rentals of these machines are frequently based on the number ofpairs of shoes or work pieces handled over a definite period of time,usually one month, it is desirable to know this figure accurately. Themachines generally comprise a carrier in the form of an elongateconveyor or else a rotatable drum or turret, carrying a plurality ofpresses successively past a loading or pressure applying station. Atthis station some means is providedfor increasing the shoeclampingpressure in the adjacent shoe press, usually by inflating the press padup against the shoe or else by mechanically pressing the shoe downagainst the pad. Merely counting the number of presses which pass thisstation may give an unfair tally of the pairage count because all of thepresses on the machine may not be in use during a given run, in whichcase skipped presses would inaccurately add to the indicated total.Also, counting the operations of the pressure increasing means mightlead to an inaccurate tally because in some instances this means may beoperated more than once on the same shoe while a tion. Thus, with aninflatable press adapted to have its pressure increased through couplingwith an air chuck, some operators might effect this coupling severaltimes, so as to feed the air in spurts as it approaches required padpressure, or in some cases it might be necessary to release, readjust,and again press a shoe before its press leave the loading station.

However, if when a press reaches the pressing station, the pressuringincreasing means is operated at all, this is a reasonable indicationthat a shoe or work piece has been treated by that press on thatparticular revolution of the carrier,

press is positioned at the staand a sufficiently accurate pairage totalcan be obtained if care is taken to count only one operation of thepressure increasing means during any one dwell of such press at thepressing station.

A general object of this invention is to provide a shoe press machinewith a counting register arranged to function in wherein no count isregistered unless the presthe manner just described,

there, any additionaloperations being ignored until the carrier is movedto bring a different press adjacent the station.

More particularly, objects of the invention are to provide a shoe pressmachine comprising a carrier having, a plurality of inflatable pressesmounted thereon for successive movement past an inflating stationpositioned along the carrier traverse and having an inflating or airsupply member such, as a chuck or valve movable into and out of coupledinflating relation with an adjacent press, wherein a counter is arrangedto register the initial coupling movement of said chuck wlth respect toa press which has arrived and is then kept ineffective against furtherregistration, despite possible repeated movements of said chuck, untilafter the carrier has been actuated to remove said press from theinflating station and bring up adifierent press.

Further objects of the invention are to provide 'a counter arrangementwhich is capable of giving a fairer and more accurate tally than wasavailable with previous registering attachments applicable to shoe pressmachines of the kind herein contemplated, which is applicable toexisting equipment with readiness and requires few added parts, andwhich is largely tamper-proof in operation.

Other objects of the invention will in part'be obvious and will in partappear hereinafter.

The invention accordingly comprises the features of construction,combination of elements, and arrangement of parts, which will beexemplified in the construction hereinafter set forth and the scope ofthe invention will be in-. dicated in the claims.

For a fuller understanding of the nature and objects of the inventionreference should be had to the following detailed description taken inconnection with the accompanying drawings, in which:

Fig. 1 is a fragmentary front elevation of the. central portion of ashoe press conveyor having counting mechanism embodying features of theinvention; i

Fig. 2 is a transverse vertical sectional View taken substantially alongline 2-2 of Fig. 1;

Fig. 3 is a diagram showing a wiring circuit for the counter-equippedconveyor of Figs. 1 and Fig. 4 is a rear elevation of another form ofshoe press machine having counting'mechanism embodying featuresot theinvention, parts being broken away better to show the underlyingconstruction;

Fig. 5 is a transverse vertical sectional view takensubstantially alongline 6-6 of Fig. 4; and

Fig. 6 is a diagram showing a wiring circuit for the counter-equippedmachine of Figs. 4 and 5.

' Referring more particularly to the drawings and first to the form ofmachine shown in Figs. 1 to 3, there is illustrated a conveyor generallyembodying the principles of the machine shown in U. S. patent to Weiss,No.1,945fl62, issued February 6, 1934. Such a conveyor has a pluralityof shoe presses [0, each having an inflatable pad ll (Fig. 2) to whichair is supplied .and from which it is discharged through a valveequipped conduit l2. The valve of this conduit i2 is normally keptseated under spring bias, but can be displaced when its plunger 13 isdepressed upon contact with suitable shoe holding abutments for holdingthe work down against the pad when it is inflated. The presses iii aremounted on a conveyor belt H which is mounted over suitable drums (notshown) at either end "of the conveyor, one of which is motor driven soas to move the presses from left to right as viewed in Fig. 1.

Each press is successively brought to a loading and inflating stationdesignated L. As the press arrives at this station, itis in deflatedcondition because of the action of deflating mechanism hereinafter morefully described, which is located at a station in advance of the loadingstation. Means for increasing the pressure against a shoe in the pressis provided at the loading and inflating station, and in the presentlydescribed form comprises an air chuck i5 connected with a suitablesource of compressed air through a flexible conduit l6. This chuck has anormally closed valve in its head which is adapted to be unseated uponcontact with the press valve plunger l3. These mutually unseating chuckand press valves: may be of well known conventional types. The chuck i5is mounted for reciprocation toward and from an adjacent shoe press in asliding carriage I! which is slidably mounted on guide rod i8 fixedalong the conveyor frame. The carriage i1 is normally urged toward theleft, as viewed in Fig. '1, by springs I9 mounted along the guide rods,and the chuck is normally held in retracted position away from a pressby means of springs 26 (Fig. 2) acting between the chuck and thecarriage I'I. As each press comes to a stop at the loading station, theair chuck is adapted to'be alined with its valve conduit l2 by means ofan alining lever 2| pivotally mounted on the chuck carriage i1 andnormally disposed in the path of a pick-up lug 22 carried on each press.The press is stopped at the loading station by means of ,a drift stopswitch 23 having a swinging switch arm 24 disposed in the path of a cam25 carried by the air chuck carriage l1. As a press approaches theloading station its pick-up lug 22 picks up the alining lever 2| on thechuck carriage, carrying the carriage with it for a short distance, theparts being so related that at such time the air chuck I5 is inalinement with the press valve conduit l2. Such moveme t of carriage i1causes cam 25 to throw open the drift stop switch 23 by swinging the arm24 to the right as viewed in Fig. 1.

This cuts'ofl the motor and allows the press to drift to a stop, whichit does within an inch or so after the motor is stopped.

the inflating air chuck or .deflating plunger hereinafter described.Each press has With the press thus stopped at the loading station inproper alinement with the air chuck, inflation is accomplished throughdepression of an inflating treadle 26-which operates through a bellcrank 21 and link 28 to swing a chuck driving lever 23 in a clock-wisedirection, as viewed in Fig. 2. This lever 29 has a bearing faceengageable against the end of the chuck i5 and acts to move it intoinflating contact with the press conduit 12 against the bias of chuckretracting springs 20. A spring 30 tensioned between the machine frameand the inflating treadle 26 servesnormally to keep the treadle in itsupmost position where the chuck driving lever 29 is disposed outwardlyaway from 'engage- I ment with the chuck. Depression of inflatingtreadle 26 in order to supply air to the press pad also serves to closea normally open magnetic counter switch 3|. This is done by means of acam 32 carried with the bell crank 21 with its cam face in engagementwith a roller on the end of a switch arm 33, the cam being arranged toswing this arm in a counter-clockwise direction, as viewed in Fig. 2, soas to close the magnetic counter switch.

After inflation has been effected, the inflating treadle 26 is released,thus allowing the air chuck to retract to its normal position out ofcontact with the press valve conduit, and the motor may then be startedto carry the inflated press away from the loading station and bring up asucceeding press. The motor is normally started by means of a motorstart treadle 34 conveniently positioned beside the inflating treadle26. A double contact motor starting switch 35 which will be described inmore detail hereinafter is adapted to be thrown between off" and on"positions upon depression of motor start treadle 34. The means for doingthis comprises a cam 36 similar to cam. 32 which rides against a rolleron the end of a switch arm 31, the cam being so arranged that upondepression of treadle 34,

and again brings the conveyor to rest.

The means for deflating .each press before it reaches the loadingstation may conveniently comprise the apparatus described in the -patentto John F. Smith. No. 2,078,588, issued 'npril' 2'1, 1937. This patentalso clearly shows -the above described form of inflating mechanisminvolving the treadle actuated air chuck and sliding carriage parts.This deflating mechanism comprises a deflating bar (not shown) mountedon a retractable plunger 39 which is normally spring biased so as tobring the bar into contact .with one or more press valve plimgers l3.The deflating bar plunger 39 is adapted to be retracted against suchspring bias by a solenoid 40 connected directly across the motor line sothat while themotor is running the deflating bar is held out of contactwith the adjacent moving presses, and whenthe motor is stopped and thedeflating solenoid deenergized, such bar moves into deflating positionunder its spring bias.

In order properly to count the number of shoes or work. pieces operatedon by a press machine starting, stopping and inflating mechanism canbest be understood upon reference to the diagram in Fig. 3. Here linecurrent is drawn through a normally closed line switch 43, the linebeing three-phase in the form illustrated, comprising line leads LI, L2and L3 on the live side of a main magnetic switch generally designated44. Contact may be established through this switch with terminals T-|,T2 and T-3 respectively when the magnet 45 of such switch is energized.The conveyor motor 46 is wired across these terminals T-|, T2 and T3 sothat it starts each time the magnetic switch 44 is closed, and stopseach time it is opened. The deflating solenoid 40 is connected acrosstwo of the motor leads, as illustrated, to

'operate in unison with the motor.

Assuming the conveyor to be in dwell position with a deflated press atthe loading station, the operator will load a shoe in such press andinflate it by depressing inflating treadle 26. This closes the normallyopen inflating treadle switch 3|, and when this is done, current passesfrom L-2 on the live side of the magnetic switch through a lead 41around the coil of counter magnet 42, and also around the coil 48 of athe motor. In doing this, current passes from L-2 and lead 41 to themain switch coil 45 and thence through a lea 55 across switch 50, whichis closed whenever cbil 48 is de-energized, to a lead 56 across anormally closed auxiliary stopping switch 51 to a lead 58 to the switchterminal 54 and across motor starting switch 35, which is now closedduring the starting operation of the motor, and thence to lead 5| backto the line at L-|. This energizes the main switch coil 45 so as toconnect line terminals Ll, L2 and L3 respectively with motor terminalsT-l, T2, and T-3, thus starting the motor 46 and operating the deflatingsolenoid 40. Once the motor has been started by. closure of switch 35against contact 54, the main switch coil 45 is kept energized until itis broken by operation of the drift stop switch 23. This switch 23 isdouble armature relay controlling switches 49 and 50. After passingthrough the counter magnet 42 and the relay coil 48, current continuesalong lead 41 to one contact of inflating pedal switch 3| and throughsuch switch, which is now closed, to a lead 5|, and thence back to theline L-| on the live side of the main switch, thus completing a circuitthrough the counter magnet 42 and causing such counter to register onceand also energizing relay 48 so as to throw its switches 49 and 50. Whenswitch 49 is thus closed, a relay energizing sustaining circuit isestablished from L2 through lead 41 and across switch 49 to a lead- 52leading to one contact or terminal 53 of the double contact motorstart-' ing switch 35. The other contact of this switch is designated54. In the normal position of motor starting switch 35 as shown in Fig.3 wherein the treadle 34 is in its elevated position, contact isestablished from lead 52 across switch 35 to lead 5|, and thence back toline Ll, thus keeping relay coil 48 energized even if the inflatingtreadle switch 3| should thereafter be opened. This circuit from L-2through lead 41 across relay switch 49 and back to the line at- L-lthrough the motor starting switch 35 also keeps the counter magnet 42energized so that such counter cannot be registered again so long asthis circuit is sustained. The sustained circuit through the countermagnet 42 and relay coil 48 is broken upon movement of the motorstarting switch 35 from contact 53 to contact 54, it being rememberedthat in the meantime the treadle inflating switch has been allowed toopen. This movement of the motor starting switch 35 disrupts the counterand relay circuit between leads 52 and 5| and de-energizes the relaycoil 48, causing switch 49 to open and switch 50 to close, these partsof the circuit thus being restored for a subsequent repeated operation.Closure of the motor starting switch 35 with contact 54 also serves toenergize the coil 45 of the .main magnetic switch 44, and thus startsopen during the conveyor dwell because the cam 25 has thrown open theswitch arm 24, but shortly after the motor starts this limit stop switchis again closed in accordance with its normal bias through return of theair chuck carriage and its cam 25 to its initial position where such camdoes not engage the switch arm 24. The means for doing this comprises acam 59 (Figs. 1 and 2) fixed along the conveyor frame, which acts tolift the alining lever 2| out of the path of the pick-up lug 22 so thatthe now moving press is free to pass beyond the air chuck carriage, andthe latter is free to return to its initial position under the bias ofsprings I9, thus allowing the drift stop switch 23 to close. Returningto the diagram in Fig. 3, when motor starting switch 35 is first closedwith contact 54, the energizing circuit for main magnetic switch coil iscompleted through the lead 5| as above described, but after the carriermoves a slight distance so that the cam 59 becomes effective, the driftstop switch 23 is closed as above described and a circuit through theswitch coil 45 is established from L. 2 through lead 41, through thecoil 45, thence to lead 55, across switch 50, through 56, switch 51, andlead .58, to a lead 60, and thence through the now closed drift stopswitch 23 to terminal T|, and thence across the now closed magneticswitch to the line at L-|. Once this circuit has been established, themain magnetic switch will remain energized even though starting switch35 is released so as to return to contact 53, and when the startingswitch has main switch coil 45 will be de-energized upon the nextopening of the drift stop 23 upon arrival of a new press at the loadingstation. In addition to the normal starting switch 35 and drift stopswitch 23, there is an auxiliary starting switch 6| and an auxiliarystopping switch 51 by means of which the conveyor can be stopped at anytime and again started. These switches are useful if for any reason itis desired to stop the conveyor at an intermediate point before thedrift stop switch becomes effective. They are so arranged that if theinflating treadle switch 3| has been operated so as to cause the counterto register, any subsequent starting of the motor mustbe done in such away as to prepare the counter. for a repeated operation. Thus,.assumingthat it is desired to start the motor through auxiliary starting switchGI and that the inflating treadle switch 3| has not been closed so as toenergize relay coil 48, then current can pass from L-2 through lead 41through the main switch coil 45 to lead 55 and across switch to lead 56,

been thus returned, theand thence across switch 51 to lead 58 w pressvalve and at the 4 through the auxiliary starting switch and back.to'the line at L-Ithrough lead II. But it the inflating treadle switchII had been operated so as to causethe counter to register, this wouldopen switch 50 and switch I would not cam It: carried oii treadlelinkage I28 in position to wipe downwardly against a roller on the endof a switch arm I33. The arrangement is such that when, camI32 movesdownwardly, the

switch arm III is swung so as to close the, normally open switch. v

Once a press at the loading station has been inflated, it is movedbeyond such station and a succeeding press is brought up for loading.This movement is effected by a motor I48 which is started by a motorstart switch I35, and is stopped by a stop switch I23 the operation ofsizes the relay coil 4!, setting up a sustaining circuit for the counterand relay coil across switch 49 until such time as starting switch 35 ismoved away from contact 53 against contact 54. So long as the operatordoes not move this I switch 35 he can operate his inflating treadleieedthe air to the conveyor repeatedly so as to infspurts, or readjust andreinflate the press 'at the loading station, and while in doing this hewill open and close the switch 3| several times,

which is dependent iipon the extent of carrier movement. A counter I isprovided, which is adapted to register once each time itsactuatingmagnet I42 is energized. This magnet is controlled thoughoperation of the inflating mechanism and is plssociated with the motorstarting and stopping switches so that it will not register unless apress at the loadin'g station is inflated,

and will register only once even though the in fiating mechanism may beoperated several times while a press is at such station. The means fordoing this can best be understood from the diagram in Fig. 6. Here,current from a threephase line is drawn through a normally closed thecounter will register only once because of the sustaining circuit acrossthe switch 49.

When the operator is satisfied-that the press at 1 on the motor startingtreadle the loading station is properly inflated, he steps motorstarting switch 35 away from contact 53 and preparing the counter andrelay circuit for repeated operation, and at the same time closing themotor. starting circuit and contact 54? This energizes the main magneticswitch 44 34, thus shifting which remains energized until opening or thedrift stop switch 23, at which time the apparatus is in its initialcondition, ready for a repeated operation.

Referring now to the form of shoe press machine shown in Figs. 4 to 6,there is provided a shoe presscarrier in the formof a rotor II4 aboutthe perlphery'ot which are mounted a number of presses-I ID. Thefeatures of this type of machine are more particularly shown in theco-pending application of John F. Smith, Serial No. 237,447, filedOctober v presses H0 has an inflatable pad III to and from which air isintroduced and discharged through a conduit II2, there being one suchcon,-

duit for each press. Each conduit communicates with a central airdistributor 62 on the rotor to which a supply of air is led undersuitable pressure. Thereis an inflating and defiating sleeve waive 62 ineach conduit between the press pad and' distributor which is adapted todeflateits pad when moved to the left, as viewed in Fig. 5, and toinflate it when moved to the right, as viewed in that figure. Inflationof the pad of a press located at a loading and inflating station L" atthe top of the rotor can be efiected by depression of an inflatingtreadle I26, depression of which, through suitable linkage, efiectsdownward movement of the links I28. This downward movement swings adouble bell crank member 64 in counter-clockwise direction, as viewed inFig. 5, causing such member to engage a valve shifting mechanism 65, andmove the latter to the right, that is to inflating position. A springI30 normally holds the treadle I26 in its uppermost position. Downwardniovement oi! the inflating treadle also serves to close an inflatingtreadle switch Iii by means of a 28, 1938. Each of the line switch I43along line leads L -I, L-2, and L-3 on the live side of a main magneticswitch generally designated I44. This switch has a magnetic coil I45which, when energized, throws a switch armature so as to establishcontact from leads Ll, L2, and L-3 respectively to terminals T--I T-2,and T--3 across which the motor leads are connected. The motoraccordingly is'operated each time the magnetic switch I44 is closedthrough energization of its coil, and is stopped each time such coil isde-energized. In the dwell position of the press rotor, the motorstopping switch I23 is arranged to de-energize such main switch coil.This position of the stop switch is shown in Fig. 6. Such stop switch isof a double contact type having terminals 66 and 61, and the switch ismovable back and forth between these terminals by means of a cam 68carried .with the motor drive sprocketI This sprocket is connected withthe rotor in such a ratio that the presses on the rotor are moved onestation upon one complete revolution of cam 68. This cam has adepression 89 into which a motor stop switch controlling plunger 10 isadapted to drop once during each cam revolution, thus permitting theswitch to break contact with-terminal 61 and establish contact'withterminal 66, which stops the motor, as will more clearly appearhereinafter.

Assuming that the rotor is and that the motor is stopped with its stopswitch I23- in the condition shown in Fig. 6, the operator will load ashoe or other work in the press at the loading station andinfiate itspress pad to apply pressure to the work. The press will arrive at suchstation in deflated condition through the action of a solenoidcontrolled deflating mechanism I38 (Fig. 4) actuated by a solenoid I40which is also controlled by the motor stop switch I23 and is arranged soas to shift the valve moving mechanism 65 of anadjacent press in timedrelation with the motor operation. The deflating mechanism is located ata station in advance of the loading station.

Returning now to the press at the loading station "L in which work hasbeen positioned ready for inflation, the operator steps on inflatingtreadle I26, thus shitting the valve 63 of such in dwell position pressto inflating position. At the same time this closes the inflatingtreadle switch I3I, setting up a circuit from L-I through a lead Hacross switch I3I, around the coil I42 of the magnetic counter MI, andalso around the coil 48 of -a relay controlling a switch I49. Afterpassing through the counter and relay coils, current continues alonglead H to one contact or terminal I53 of a double contact motor startingswitch I35, the other terminal of which is designated I54. After thecurrent passes through switch I35, it continues to a lead I2, and thenceback to the live side of the line at L2. This serves to cause themagnetic counter to register once, and once this counter registeringcircuit has been established it is sustained by the relay switch I49until subsequent operation of motor starting switch I 35, even thoughinflating treadle switch I3I may be opened in the meantime. Thus, wheninitial closure of switch I 3I serves to energize relay coil 48 andclose switch I49, current may thereafter pass from L-I through lead IIaround a lead 73 across the switch I49 and back to the lead II, thusbridging the switch I3I and making it immaterial whether such switch isthereafter open or closed so far as sustenance of the counter magnetcoil and relay coil circuit is concerned. Thus, the operator may workthe inflating mechanism While a given press is at the loading station asmany times as needed, while only causing the counter t olregis ,v

ter once. I

The counter and relay circuit is broken and restored for repeatedoperation upon operation of the motor start switch I so as to move suchswitch from contact I 53 to contact I54. contact with I54 isestablished, current may pass from LI through lead I3, around the mainswitch coil I 45, and thence to contact I54 and across switch I35 tolead 12, and thence back to the line at L2, thus energizing the mainswitch and starting the motor. At the same time the deflating solenoid Iis energized by current passing from LI along a lead I4, around thesolenoid coil I40 to the contact 66 of motor stop switch I23, acrosssuch switch along lead 14, and thence to lead 13, to contact I54, acrossthe now closed switch I35, to lead I2, and thence back to the line atL2. Shortly after the motor starts, this circuit through the deflatingsolenoid I40 is broken through movement of the switch actuating plunger10 out of the cam drop 69 up along the cam rise, where it breaks contactat 66 and establishes contact at 61 in the motor stop switch I23. Aftercontact has thus been established at 61 by means of the cam 68, themotor start switch I35 may be returned to its normal position in contactwithterminal I53, and the main switch will remain energized despite theopening of the switch I35. This is done by means of a circuit passingfrom LI through lead I3 around the main switch coil I45, thence to lead74, across switch I23 to contact 61', thence When through a lead 15 backto lead 12, and thence to the line at L2. This sustaining circuit forthe main magnetic switch will remain closed during the running of themotor as long as the plunger I0 rides along the cam rise, but willbedisrupted upon the completion of one revolution of the cam whensuchplunger again seats in the depression 69. At this time the entirecircuit is restored to its initial condition, ready for a repeatedoperation of the inflating treadle switch I 3|, and thereafter of themotor starting switch I35.

In both illustrative forms of the invention, it

will be seen that a fair count of the work'done on a machine is obtainedby the magnetic counand which registers only once, despite repeatedoperations of the inflating mechanism, while a press remains at suchstation, since th counter magnet remains energized .up until the timethe motor starting switch is operated to move the press away from suchstation and bring up a new press.

It will be understood that the pressing equipment can be of variouskinds suited to various types of work, and that the association of thecounting mechanism with the pressure applying controls is capable ofbeing effected with various fluid pressur applying arrangements, thoseherein described in detail being merely illustrative of preferred forms.

Since certain changes may be made in the above construction ,anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove description or shown in the accompanying drawings shall beinterpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims'are intended tocover all of the generic and specific features of the invention hereindescribed, and all statements of the scope of the invention which, as amatter of language, might be said to fall therebetween.

Having described my invention what I claim as new and desire to secureby Letters Patent, is:

1. A shoe press machine comprising a. carriermovable past a loadingstation, a plurality of presses on said carrier, a driving motor formoving said carrier successively to present said presses at saidstation, a motor driving circuit including an operator controlled motorstarting switch and a carrier controlled motor stopping switch, operatorcontrolled means for increasing the pressure in a press at said loadingstation, a circuit including an electric counter and a pilot switchclosable upon operation of said pressure increasing means to energizesaid counter and cause it to register once, a sustaining circuitarranged to be energized upon closure of said pilot opened, said motorstarting switch being included in said sustaining circuit and arrangedto deenergizethe latter when moved to motor starting position, andmeans'controlled by said sustaining circuitpreventing completion of saidmotor driving circuit whenever said sustaining circuit is energized,whereby said motor cannot be started while said pressure increasingmeans is in position to close said pilot switch.

2. A shoe press machine comprising a carrier movable past an inflatingstation, a plurality of inflatable presses on said carrier, drivingmeans for intermittently moving said carrier successively to presentsaid presses at said station, a treadle operated air chuck movable fromretracted position into coupled inflating relation with a press at saidstation, a pedal control for starting said driving means, a counter,counter,

being effective to restore said counter holding means to its inoperativecondition and means governed by said counter holding means for renderingsaid pedal control ineffective to start said driving means unless saidchuck is in retracted position. x

3. A shoe press machine comprising a carrier movable past an inflatingstation, a plurality of inflatable presses on said carrier, a motor fordriving said carrier to present said presses successively at saidstation, an air'supply member movable into coupled inflating relationwith a press at said station, a motor control circuit including atwo-way operator controlled motor switch and a normally closed relaycontrolled switch, a pilot circuit including the coil of said relay anda pilot switch closable to energize said relay when said supply memberis moved to inflating position, said relay when energized acting, tohold said normally closed relay controlled switch open to preventenergization of said motor control circuit, a sustaining circuit'forsaid relay coil including one terminal of said two-way motor switch,said last named switch being arranged to disrupt said sustaining circuitwhen it is moved from said terminal to motor starting position, and acircuit including an electric counter ar-: ranged to be energizedconcurrently with said relay coil.

4. A shoe press machine comprising a carrier. movable past a loadingstation, a plurality of presses mounted on said carrier; an electricmotor for driving said carrier successively to present said pressesopposite said loading station, pressure applying means operable toincrease the pressure in a press at said loading station, a motordriving circuit including a stoppin switch for said'motor, an electriccounter, counter energizaacaaaa 3 I ing means actuated by said pressureapplying means, a sustaining circuit arranged to be energized by saidpressure applying means and to keep said counter energized so that itwill register only once during the period in which said sustainingcircuit remains energized, said sustaining circuit including a startings ch for said motor which is arranged to cut out said counter sustainingmeans when moved to motor starting position, means including saidstopping switch,

for sustaining energization of said motor, and means operable after adefinite carrier movement to operate said stopping switch to stop themotor.

5. A shoe press machine comprising a carrier movable past a loadingstation, a pluralityoi presses mounted on said carrier, an electricmotor for'driving said carrier successively to present said pressesopposite said loading station, pressure applying means operable toincrease the pressure in a press at said loading station, a magneticcounter, counter operating means actuated by said pressure applyingmeans, a, counter sustaining circuit holding said counter energized andarranged to be energized upon operation ofsaid pressure applying means,a motor driving circuit including a motor starting switch and a stoppingswitch for said motor closable upon carrier movement, said motor drivingcircuit and said counter sustaining circuit each having a terminalselectively engageable by said motor start switch, said motor startswitch being arranged to deenergize said counter sustainin circuit andto energize said motor driving circuit when moved from the sustainingcircuit terminal to the driving circuit terminal, and means operableafter a definite carrier movement to open said motor stopping switch. 1

JOHN -FREDERICK SMITH.

